package decrypt import ( "crypto/aes" "crypto/cipher" "crypto/sha1" "crypto/sha256" "encoding/asn1" "encoding/hex" "hack-browser-data/log" "syscall" "unsafe" "golang.org/x/crypto/pbkdf2" ) func ChromePass(encryptPass, key []byte) ([]byte, error) { if len(encryptPass) > 15 { // remove prefix 'v10' return aesGCMDecrypt(encryptPass[15:], key, encryptPass[3:15]) } else { return nil, errPasswordIsEmpty } } // chromium > 80 https://source.chromium.org/chromium/chromium/src/+/master:components/os_crypt/os_crypt_win.cc func aesGCMDecrypt(crypted, key, nounce []byte) ([]byte, error) { block, err := aes.NewCipher(key) if err != nil { return nil, err } blockMode, err := cipher.NewGCM(block) if err != nil { return nil, err } origData, err := blockMode.Open(nil, nounce, crypted, nil) if err != nil { return nil, err } return origData, nil } type dataBlob struct { cbData uint32 pbData *byte } func NewBlob(d []byte) *dataBlob { if len(d) == 0 { return &dataBlob{} } return &dataBlob{ pbData: &d[0], cbData: uint32(len(d)), } } func (b *dataBlob) ToByteArray() []byte { d := make([]byte, b.cbData) copy(d, (*[1 << 30]byte)(unsafe.Pointer(b.pbData))[:]) return d } // chrome < 80 https://chromium.googlesource.com/chromium/src/+/76f496a7235c3432983421402951d73905c8be96/components/os_crypt/os_crypt_win.cc#82 func decryptStringWithDPAPI(data []byte) ([]byte, error) { dllCrypt := syscall.NewLazyDLL("Crypt32.dll") dllKernel := syscall.NewLazyDLL("Kernel32.dll") procDecryptData := dllCrypt.NewProc("CryptUnprotectData") procLocalFree := dllKernel.NewProc("LocalFree") var outBlob dataBlob r, _, err := procDecryptData.Call(uintptr(unsafe.Pointer(NewBlob(data))), 0, 0, 0, 0, 0, uintptr(unsafe.Pointer(&outBlob))) if r == 0 { return nil, err } defer procLocalFree.Call(uintptr(unsafe.Pointer(outBlob.pbData))) return outBlob.ToByteArray(), nil } func DPApi(data []byte) ([]byte, error) { dllCrypt := syscall.NewLazyDLL("Crypt32.dll") dllKernel := syscall.NewLazyDLL("Kernel32.dll") procDecryptData := dllCrypt.NewProc("CryptUnprotectData") procLocalFree := dllKernel.NewProc("LocalFree") var outBlob dataBlob r, _, err := procDecryptData.Call(uintptr(unsafe.Pointer(NewBlob(data))), 0, 0, 0, 0, 0, uintptr(unsafe.Pointer(&outBlob))) if r == 0 { return nil, err } defer procLocalFree.Call(uintptr(unsafe.Pointer(outBlob.pbData))) return outBlob.ToByteArray(), nil } type NssPBE struct { SequenceA Encrypted []byte } type MetaPBE struct { SequenceA Encrypted []byte } type SequenceA struct { PKCS5PBES2 asn1.ObjectIdentifier SequenceB } type SequenceB struct { SequenceC SequenceD } type SequenceC struct { PKCS5PBKDF2 asn1.ObjectIdentifier SequenceE } type SequenceD struct { AES256CBC asn1.ObjectIdentifier IV []byte } type SequenceE struct { EntrySalt []byte IterationCount int KeySize int SequenceF } type SequenceF struct { HMACWithSHA256 asn1.ObjectIdentifier } func DecodeMeta(decodeItem []byte) (pbe MetaPBE, err error) { _, err = asn1.Unmarshal(decodeItem, &pbe) if err != nil { log.Error(err) return } return } func DecodeNss(nssA11Bytes []byte) (pbe NssPBE, err error) { log.Debug(hex.EncodeToString(nssA11Bytes)) _, err = asn1.Unmarshal(nssA11Bytes, &pbe) if err != nil { log.Error(err) return } return } func Meta(globalSalt, masterPwd []byte, pbe MetaPBE) ([]byte, error) { return decryptMeta(globalSalt, masterPwd, pbe.IV, pbe.EntrySalt, pbe.Encrypted, pbe.IterationCount, pbe.KeySize) } func Nss(globalSalt, masterPwd []byte, pbe NssPBE) ([]byte, error) { return decryptMeta(globalSalt, masterPwd, pbe.IV, pbe.EntrySalt, pbe.Encrypted, pbe.IterationCount, pbe.KeySize) } func decryptMeta(globalSalt, masterPwd, nssIv, entrySalt, encrypted []byte, iter, keySize int) ([]byte, error) { k := sha1.Sum(globalSalt) log.Println(hex.EncodeToString(k[:])) key := pbkdf2.Key(k[:], entrySalt, iter, keySize, sha256.New) log.Println(hex.EncodeToString(key)) i, err := hex.DecodeString("040e") if err != nil { log.Println(err) } // @https://hg.mozilla.org/projects/nss/rev/fc636973ad06392d11597620b602779b4af312f6#l6.49 iv := append(i, nssIv...) dst, err := aes128CBCDecrypt(key, iv, encrypted) if err != nil { log.Println(err) } return dst, err }